/ Dictionary / Index E extensometer: Meaning and Definition of Find definitions for: ex•ten•som•e•ter Pronunciation: (ek"sten-som'i-tur), [key] — n. an instrument for measuring minute degrees of expansion, contraction, or deformation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extensive extensor Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language